Construction of high-pressure water-taps.



No. 659,644. Patented Oct. I6, 1900.

w. BRADLEY. CONSTRUCTION OF HIGH PRESSURE WATER TAPS.

(Application Med Apr. 19. 1899.)

(No Model.) 2 Sheets-Sheet 1.

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w. BRADLEY. CONSTRUCTION OF HIGH PRESSURE WATE'B'TAPS.

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* UNrrn STATES tact.

WILLIAM BRADLEY, OF SHEFFIELD, ENGLAND.

SPECIFICATION forming part of Letters Patent No. 659,644, dated October16, 1900.

Application filed April 19, 1899. Serial n5. 713.675. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM BRADLEY, a subject of the Queen of GreatBritain, residing at Sheffield, in the county of York, England, haveinvented Improvements in the Construction of High-Pressure Water 'laps,of which the following is a specification.

My invention relates to the construction of high-pressure water-taps,the object being to construct a tap which is able to shut off water athigh pressure and practically without coucussion, also without pulsationof the moving parts, and which is assisted both in opening and closingby the pressure of the water.

The invention is applicable to ball-taps, bib-taps, stop-taps, and thelike, and the accompanying drawings clearly illustrate how the inventionmay be carried into practice in each case.

Like letters of reference indicate like parts in any of the figures inwhich they occur.

Figure 1 is an elevation, partly in section, of a balltap made accordingto my invention; Fig. 2, a similar view of a ball-tap with the valvereversed in position; Fig. 3, a screwdown tap constructed to act as astop-tap according to my invention; Fig. 4, my invention applied to abib'tap as an example only.

In the application of my invention to balltaps the outlet maybe madeeither through the valve itself or the valve may be reversed and theoutlet be made through the seating.

In the ball-tap shown in Fig. 1, the outlet being through the valve, Imake the front part of the body A vertical and at a right angle with theinlet-passage B, the lower portion of the front part forming a cylinderto receive the cylindrical part of the valve 0, with its cup-leather D.The cylindrical part 0 of the valve is smaller in area than the head Iof the valve and larger than the outlet 0 Above the cylinder is anannular chamber E, opposite the inlet-passage B, to permit water to flowfreely around the head I of the valve 0, which is located in thischamber. Above the chamber E is a circular opening F, surrounded by aflange and communicating with a screw-threaded recess, into which isscrewed a cap G, provided with a seating H in the form of a washer, andpreferably of rubber or leather, which is held by the cap firmly againstthe upper face of the before-mentioned flange. The central portion G ofthe cap G, which is of smaller diameter, projects beyond the seating Hinto the annular chamber, leaving a circular opening F for the frontedge of the valve-face O to pass through and reach the seating H. Thevalve-seating is secured to the cap by passing it over a thin collar K,which holds it in position when the cap is removed. The projection G isof smaller diameter than the bore of the cylinder in which the valve 0slides. The valve is made with a waterway W through its longitudinalcenter, its upper edge C being the valve-face and its lower end C beingthe outlet. It is preferably made in two parts which are screwedtogether for the purpose of bolding a cup-leather D, which fits thecylinder and bears against the shoulder on the lower part of the valve.The head of the valve is increased in diameter, and its face is recessedin two diameters, the larger one to allow the edge to pass over thecollar K and bed upon the seating H and. the inner recess to fit moreclosely over the projection G when the valve is being closed by theaction of the float-lever J. As the valve is closing the projection Genters the recessed face of the valve, and when it reaches the edge ofthe smaller recess the flow of water passing through the narrow space tothe outlet becomes so attenuated that the resisting forces, due in onedirection to the water forcing its way to the outlet (tending to keepthe valve open) and in the other direction to its action upon the largerarea of the valve-head, (tending to close the valve,) eventually reach apoint of equilibrium, and then the equilibrium being overcome by theincreased pressure of the float the valve is instantly closed withoutconcussion and is held closed by the pressure of the water. Sufficientplay is allowed between the end of the float-lever and the valve topermit the valve to be closed automatically by the action of the wateralone. When water is withdrawn from the cistern, the float,with itslever, falls, and when it has overcome the resistance of thewater-pressure and opened the valve beyond the point of equilibrium thevalve is forced open to its full extent by the water automatically.

According to the second arrangement (shown in Fig. 2) the valve 0 isreversed in In Fig. 3 the invention is illustrated as applied to ascrew-down tap combined with a stop-tap. For this purpose I lengthen thelower part of the body, into which the outletnozzle N is screwed, so asto leave a recess with a screw-threaded interior below the nozzle, intowhich recess I screw a u nion-plu g U, with a union-pipe I1, constructedto make a joint with the end of the nozzle N. This junction can be usedwith other taps. This union can be connected or disconnected and asoldered joint made to a lead pipe at any time when the valve is closed.The screw Mtravels upon the screwed part of the body A and forces downthe valve 0 through the medium of an interposed spiral spring S, andwhen turned in the opposite direction it raises it by means of acrosspin O. The action of the valve is similar to those beforedescribed.

In the simple arrangement of a bib-tap (shown in Fig. 4) theconstruction of the valve and its parts is the same as in the others;but in this tap the valve is raised and lowered by hand, the cap Q beingof any convenient coufiguration, or any other suitable attachment,

such as a short lever or cam, may be substi tuted for the cap Q, ifdesired.

In taps having a valve and its coacting parts constructed according tomy invention, as hereinbefore described, the recoil of the water whenthe valve is closed cannot reopen it, and pulsation of the valve istherefore impossible.

Having thus described my invention with the manner in which it may becarried into practice, what I wish to claim is- 1. A tap in which iscomprised a valve sliding in a cylinder, the head of the valve being oflarger area than that of the said cylinder, and the cylinder being oflarger area than the outlet, the valve-face having a recess and the edgeof the recess made to fit closely over a projecting part at thevalve-seat before finally closing as described and shown.

2. A tap comprising a body orcasing having an inlet for the waterlocated at a right angle or therea'bout to the valve, a valve having itsstem provided with ahydraulic cupleather, the valve-face having a recessto fit closely over an annular projection in the casing before itsouteredge reaches the valveseat, substantially as described and shown.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

WILLIAM BRADLEY.

Witnesses:

GEO. H. SHIRLEY RoLLIsoN, ENSOR D. DEWEY.

